If it's a recent 105, it's a Hollowtech BB, which is integrated into the crank; to switch to the Sugino, you'd need a JIS square-taper BB in its place....
What tire size are you running? If you're on 32's, might want to try 38's, that might help a bit, too... it's subtle, but, sometimes that might just be enough.... But, I would think switching to a crank w/ a shorter arm wouldn't be a bad thing, in your case... can't answer about the Q-difference and influence of that on pedal strike,, but someone probably can .... On Monday, January 21, 2013 2:33:47 PM UTC-5, Dave wrote: > > Hey hey, > Question about crank length and possible change. I'm riding a 59 bleriot > protovelo that I bought used with a 175mm shimano 105 cranks on it. The > pedal strike I get is kind of avoidable,but still present frequently. > I've tried the mks stream pedals that it came with, along with the gr-9 > platform pedals. With toe clips, they strike the ground if moving the > bike without my feet in them. Any hard turns are problematic if you need > to pedal through. > > How much difference do you think moving to 165mm sugino xd2 cranks would > provide? I'm not sure of the Q factor on the shimano cranks, or how new > cranks would work with my bottom bracket (not entirely sure what's in > there)....so not sure if any of these questions can be answered. > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To view this discussion on the web visit https://groups.google.com/d/msg/rbw-owners-bunch/-/33DUBPqpA5YJ. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.